Log management and rotation in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the log rotation days in Jenkins pipeline.

Jenkins

pipeline {
  agent any
  options {
    buildDiscarder(logRotator(daysToKeepStr: '[1]'))
  }
  stages {
    stage('Example') {
      steps {
        echo 'Hello World'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

A30

B10

C60

D90

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of a number

Setting days to 0 which disables retention

The daysToKeepStr option sets how many days Jenkins keeps the logs before deleting them. Here, 30 days is a common default.

2fill in blank

medium

Complete the code to rotate logs based on the number of builds to keep.

Jenkins

pipeline {
  agent any
  options {
    buildDiscarder(logRotator(numToKeepStr: '[1]'))
  }
  stages {
    stage('Build') {
      steps {
        echo 'Building...'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

A20

B5

C10

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using a very high number causing disk space issues

Using zero which disables retention

The numToKeepStr option limits how many builds Jenkins keeps logs for. Keeping 5 builds is a common practice to save space.

3fill in blank

hard

Fix the error in the log rotation configuration to correctly discard old builds.

Jenkins

pipeline {
  agent any
  options {
    buildDiscarder(logRotator(numToKeepStr: '[1]', daysToKeepStr: '15'))
  }
  stages {
    stage('Test') {
      steps {
        echo 'Testing...'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

A-5

B0

C10

Dabc

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero disables retention

Using negative numbers causes errors

Using non-numeric strings causes syntax errors

The numToKeepStr must be a positive number. '10' is valid, while '0', negative numbers, or non-numeric strings cause errors.

4fill in blank

hard

Fill both blanks to configure Jenkins to keep 7 days of logs and 3 builds.

Jenkins

pipeline {
  agent any
  options {
    buildDiscarder(logRotator(daysToKeepStr: '[1]', numToKeepStr: '[2]'))
  }
  stages {
    stage('Deploy') {
      steps {
        echo 'Deploying...'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

A7

B3

C14

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the values between days and builds

Using zero or negative numbers

Setting daysToKeepStr to '7' keeps logs for one week, and numToKeepStr to '3' keeps logs for the last three builds.

5fill in blank

hard

Fill all three blanks to configure Jenkins to keep logs for 14 days, 10 builds, and disable artifact retention.

Jenkins

pipeline {
  agent any
  options {
    buildDiscarder(logRotator(daysToKeepStr: '[1]', numToKeepStr: '[2]', artifactDaysToKeepStr: '[3]'))
  }
  stages {
    stage('Package') {
      steps {
        echo 'Packaging...'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

A14

B10

C0

D7

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-numeric values

Setting artifactDaysToKeepStr to a positive number when disabling is intended

Setting daysToKeepStr to '14' keeps logs for two weeks, numToKeepStr to '10' keeps the last ten builds, and artifactDaysToKeepStr to '0' disables artifact retention.